I got my original Yellow Top (for the Trooper RS before transferring to the VX) through a friend of a friend who was an Interstate Battery dealer at a good discount. Since he's no longer in business we got the last two Red Tops (for the IronMan and Kathy's Trooper) at local AutoZones. You can really shop online and save a few bucks, but without the hassle and expense of shipping it's hard to beat a local store.